1964/56/1

Semigroups on continua ruled by arcs

On the lexicographic dimension of linearly ordered sets

Semigroups and clusters of indecomposability

Incompressible transformations

On products of sets in a locally compact group

On quasi-translations in 3-space

Homogeneous operations and homogeneous algebras

Zum Bernsteinschen Äquivalenzsatz

On regular extensions of operator systems.

Sur les familles d'ensembles infinis des nombres naturels

Invariant Borel sets

On Borel measurability of orbits